Natural Disaster Risk in Marissa

Natural Hazard Profile: Marissa, Illinois

Marissa, in St. Clair County, is a small community of about 2,046 situated in the interior eastern United States. Its humid continental climate brings bitterly cold winters and hot, humid summers, and in particular a severe thunderstorm and tornado season each spring. These conditions collectively define the natural hazard environment that Marissa residents and property owners must navigate.

According to FEMA's National Risk Index, Marissa carries an overall risk score of 7.4/10, placing it in the high category. Seismic activity is the dominant hazard, with the community situated in or near an active tectonic zone capable of producing damaging ground shaking. The area also faces notable exposure to hail and heat.

Within Illinois, Marissa's risk is, considerably above the 5.8/10 state average. Nationally, it ranks well above the U.S. national average of 4.5/10. FEMA's analysis of St. Clair County identifies earthquake as the foremost hazard, followed by hail and heat. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a high natural disaster risk rating, Marissa residents benefit from taking preparedness seriously. Reviewing insurance coverage for earthquake and secondary hazards, registering for emergency alerts, and maintaining a household emergency kit are practical steps that can significantly reduce impact during a major event.